We look at the division of 640628 by 12 
Let's see how many times 12 fits into 640628.

Going ahead to step 1:
6 divided by 12 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 12

Step 2:
When dividing 64 by 12, we get 5 with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 60 from 64 and we're left with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 12

Step 3:
12 goes into 40 3 times with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 53.0
If we take 36 away from 40, we end up with 4.
Include the next digit (6) from the dividend after 4, then repeat: 46 / 12

Going ahead to step 4:
12 can be fit into 46 3 times, resulting in a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 533.0
Subtract 36 from 46 to get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 12

Let's proceed to step 5:
102 divided by 12 is 8 with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 5338.0
If we take 96 away from 102, we end up with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 12

Going ahead to step 6:
12 goes into 68 5 times with a remainder of 8.
Put 5 as the next digit of the answer. 
Result so far: 53385.0
Subtract 60 from 68 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
12 goes into 80 6 times with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 53385.6
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
If we divide 80 by 12, we get 6 and a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 53385.66
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 53385.66 with a balance of 0.008.